| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 57e - Saginaw Lake Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48471 - Sandusky, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 16 | 24 | 35 | 45 | 55 | 59 | 58 | 50 | 40 | 31 | 21 | 37 |
| Avg Max Temp (°F) | 29 | 31 | 41 | 54 | 68 | 77 | 82 | 79 | 72 | 59 | 46 | 34 | 56 |
| Avg Precip (In.) | 1.62 | 1.29 | 1.97 | 2.37 | 2.53 | 2.91 | 2.81 | 3 | 3.81 | 2.49 | 2.52 | 2.12 | 29.44 |